Question

Would you please stop ________ in my room?

1. A.
   spit
2. B.
   to spit
3. C.
   spitting
4. D.
   to spitting

Answer 1

C
stop有两个短语，分别是stop doing sth.“停止做某事”和stop to do sth.“停下来去做……”，此题意为“停止吐痰”。